This is what Kageangel did to fix the blackscreen! Does it work? I have no idea!

Deleted EVERYTHING in .minecraftRestarted MC and force updatedWent in WinRAR and deleted the meta-infDeleted my Modloader/Audiomod/ShockAhIP r5 and Aether 1.7.3 v1.01REdownloaded all four modsDownloaded one by one, starting up MC after each one to see if it workedBacked up as each one workedAdded everything in the Jar of the Aether folder into the minecraft.jarAdded the Aether/Resources/Mods content into the .minecraft/Resources/Mods foldercopied/replaced all copies in the .minecraft/Resources/Mods folderStarted up MC and bam, worked!